Remove patch number from dependency versions (#214)

- Cargo treats non-prefixed version numbers the same when the patch number is omitted.
- This is just cleaner and makes breaking updates easier to manage.

examples/minimal-fltk/Cargo.toml

@@ -11,7 +11,7 @@ optimize = ["log/release_max_level_warn"]
 default = ["optimize"]
 
 [dependencies]
-fltk = { version = "1.2.6", features = ["raw-window-handle", "no-images", "no-pango"] }
+fltk = { version = "1.2", features = ["raw-window-handle", "no-images", "no-pango"] }
 env_logger = "0.9"
 log = "0.4"
 pixels = { path = "../.." }